/Engine/Source/Runtime/Slate/Public/Framework/Application/SlateApplication.h
Gets all visible child windows of a window.
void GetAllVisibleChildWindows ( [TArray](API\Runtime\Core\Containers\TArray)< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWindow](API\Runtime\SlateCore\Widgets\SWindow) > > & OutWindows, [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWindow](API\Runtime\SlateCore\Widgets\SWindow) > CurrentWindow )